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Nevada M.J. Nanulaitta
Politeknik Negeri Ambon
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Journal : Journal Mechanical Engineering

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The Effect of Variation Percentage Alkalization (NaOH) On the Mechanical Properties Analysis and Water Absorption Behaviour in Biocomposite with Cassava Rubber Starch Nevada. J. M. Nanulaitta
Journal Mechanical Engineering Vol. 1 No. 1 (2023): APRIL 2023
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v1i1.1622

Abstract

Composites made using natural ingredients namely sago fiber and cassava rubber starch as the matrix. This composite making is expected to get good bending strength, impact strength and water absorption rate. Composites are made using the hand lay-up method with a variation of the matrix and the variation of the volume fraction of sago pith fibers is 50%: 50% and 70%: 30% using NaOH liquid and distilled water in the alkali process with a percentage ratio of 0%, 5%, 10%, 15% and 20%. soaking time in NaOH liquid for 120 minutes. The results of this study were found to be the best impact value on composites with 50%: 50% fiber volume variation with 15% alkaline NaOH liquid process, the highest value on the energy absorbed by the composite was 7.5479 (J) with an impact strength of 0.0755 (J/mm2) at a variation of 70%: 30% the highest absorption energy is 5,7430 (J) while the impact strength is 0.0574 (J/ mm2) at 15% NaOH liquid percentage. The highest bending strength is 226.035 MPa at 50%: 50% volume fraction variation with 15% NaOH liquid percentage, 70%: 30% fiber volume fraction variation with the highest value 206,199 MPa at 15% NaOH liquid percentage. The best water absorption rate is at 8 , 82% that occurs in the variation of 50%: 50% fiber volume fraction with 15% percentage of the alkaline process NaOH and 9.16% in the variation of 70% fiber volume fraction: 30% fiber with 15% NaOH liquid in the alkalization process Keywords : Sago Pith Fiber, Cassava Rubber Starch, NaOH, Hand Lay Up Method, Bending Strength, Impact Strength and Water Absorption Rate
Pengaruh Variasi Ketinggian Elektrikal Stik Out Pengelasan Gas Metal Arc Welding (GMAW) Terhadap Sifat Mekanis Pada Pipa Seamless Imam A Hanifah; Nevada. J. M. Nanulaitta; Graciadiana. I. Huka
Journal Mechanical Engineering Vol. 1 No. 2 (2023): AGUSTUS
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v1i2.1990

Abstract

Welding is a process of joining two or more metal materials together through a local melting process. There are many types of welding, one of which is Gas Metal Arc Welding (GMAW). In gas metal arc welding (GMAW), one of the factors that affect the result of welding is the height of the stick out. The purpose of this study was to determine the effect of changing the height of the stick out in the gas metal arc welding (GMAW) welding process on the pipe on the mechanical strength of the pipe. The method used in this study is a quantitative method with data collection techniques through the library, and the main data sources obtained directly from the research process, and related interviews regarding the tools and materials used at the Ambon State Polytechnic Mechanical Engineering Laboratory. The results of the research that the author did show that the greatest Impact Strength with a value of 0.1136 KJ/mm2 is at a height of 7 mm electrical stick out and 0.0960 KJ/mm2 is at a height of 9 mm electrical stick out, this can be seen in the figure 4.1 and 4.2 where the graph will have a decreasing trend with increasing variations in the height of the electrical stick out in GMAW welding, while for the bending test the shorter the electrical stick out will result in increased welding penetration, so that the melting of the weld material in the welding process is getting deeper and the cooling process is getting deeper time results in increased ductility of the seamless pipe, it also depends on the thickness of the material being welded, the gas flow rate and metal transfer in the weld. Keywords : GMAW Welding, Stick Out, Mechanical Properties, Seamless Pipe, Impact Test, Bending Test
PENGARUH VARIASI KETINGGIAN STICK OUT PENGELASAN GMAW DAN VARIASI SUDUT SAMBUNGAN PADA KAMPUH ½ V BAJA KARBON SEDANG TERHADAP SIFAT MEKANIS Julian Salakory; Graciadiana I. Huka; Nevada J. M. Nanulaitta; Annafiyah Annafiyah; Ratna Ayu Pawestri Kusuma Dewi
Journal Mechanical Engineering Vol. 1 No. 3 (2023): Desember
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v1i3.2095

Abstract

Abstrak Pengelasan merupakan suatu proses penyambungan antara kedua benda logam dengan cara melelehkan atau meleburkan sebagian dari logam tersebut. Salah satu jenis pengelasan yang ada di Indonesia yaitu pengelasan GMAW (Gas Metal Arc Welding). Untuk penggunaan gas pelindung pengelasan GMAW biasanya menggunakan gas Argon sebagai pelindung yang di aplikasikan pada bahan karbon sedang. Penelitian ini dilakukan dengan tujuan untuk mengetahui variasi ketinggian stick out pengelasan GMAW dan variasi sudut kampuh ½ V baja karbon sedang terhadap sifat mekanis. Metode yang digunakan yaitu metode kuantitatif dengan menggunakan data primer yakni pengambilan data pada Lab dan data sekunder berupa studi literature. Berdasarkan hasil penelitian, pengujian impak berada pada ketinggian stick out 10 mm dimana 60° kampuh ½ V memiliki kekuatan tertinggi dengan nilai 0,0920 KJ/mm2 dan kekuatan impak terendah dengan nilai 0,0383 KJ/mm2 pada 45° kampuh ½ V . Sedangkan untuk kekuatan bending tertinggi berada pada ketinggian stick out 5 mm dengan sudut kampuh ½ V 45° sebesar 608,33 MPa dan kekuatan bending terendah sebesar 475,00 Mpa pada sudut kampuh ½ V 60°. Kata Kunci : Pengelasan GMAW, Kekuatan Impak, Kekuatan Bending
Pengaruh Temperature Tempering Terhadap Kekerasan Pada Baja Karbon Sedang Hasil Pengelasan FCAW (Flux-Cored Arc Welding) Clara Sekeroney; Nevada. J.M Nanulaita; Frederick Dematacco; Mohammad Anas Fikri; Ike Dayi Febriana
Journal Mechanical Engineering Vol. 1 No. 3 (2023): Desember
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v1i3.2098

Abstract

Carbon steel is a type of alloy steel consisting of various elements, especially iron (Fe) and carbon (C). In general, the properties of steel are affected by the percentage of carbon and the microstructure of steel which is affected by steel composition and heat treatment. The welding process can change the structure and composition of steel. The safety of weld results can be carried out after welding using a heat treatment process. This tempering aims to obtain better and desired mechanical properties. Tempering is carried out using temperatures of 200⁰C, 250⁰C and 300⁰C with cooling using air media and mechanical testing will be carried out.The results of this research showed that tempering temperature had an effect on the hardness value of medium carbon steel resulting from FCAW welding. The hardness value at a temperature of 200℃ was 54.75, a temperature of 250℃ was 53.00 and a temperature of 300℃ was 52.04. The higher the temperature, the lower the hardness value and conversely, the lower the tempering temperature, the higher the hardness value.Keywords: Welding, Tempering, Hardness
Analisa Pengaruh Waktu Penahanan (Holding Time) Pada Proses Tempering Terhadap Sifat Mekanis Baja Karbon Menengah Hasil Pengelasan Fcaw (Flux Core Arc Welding) Rey Joy Toding Padang; Nevada. J.M Nanulaita; Cley Talkua; Agustinus O. Lopuhaa; Faizatur Rohmah
Journal Mechanical Engineering Vol. 1 No. 3 (2023): Desember
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v1i3.2099

Abstract

FCAW (Flux Core Arc Welding) welding is a type of welding process or joining metal materials that uses a heat source from electrical energy which is converted or converted into heat energy. a roll and uses gas as a protector for the weld metal which melts during the welding process. The content of medium carbon steel is 0.3%C - 0.6%C. This carbon steel has advantages compared to low carbon steel, medium carbon steel has stronger mechanical properties with a higher level of hardness than low carbon steel. . Before and after welding carbon steel materials, material testing will be carried out. With this test, it is hoped that the hardness and bending strength of the material will be known. The method used is a quantitative method including experimental research. With a plate thickness of 5mm, a variation of the V seam angle with an angle of 45° with a depth of 2.5mm. Using a stickout height of 5mm by varying the holding time, namely 30 minutes, 60 minutes, 90 minutes for FCAW welding  Keywords: Carbon steel, FCAW (Flux Core Arc Welding), Holding Time, Hardness Test, Bending Test
PENGARUH VARIASI SUDUT PENGELASAN KAMPUH V DAN KETINGGIAN ELEKTRIKAL STICK OUT PENGELASAN GMAW TERHADAP SIFAT MEKANIS BAJA ST-42 Fredrik Demataco; Nevada. J.M Nanulaita; Lukman Hadiwijaya; Ratna Ayu Pawestri Kusuma Dewi
Journal Mechanical Engineering Vol. 1 No. 3 (2023): Desember
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v1i3.2120

Abstract

GMAW (Gas Metal Arc Welding), which is a solid or tubular welding electrode that is fed continuously mechanically from a roll of electrode wire inside the welding machine. The electrode is fed via a gun or torch by maintaining the height of the arc formed between the tip of the electrode wire and the material being welded or the base metal. GMAW (Gas Metal Arc Welding) is MAG (Metal Active Gas) and MIG (Metal Inert Gas) welding which is very efficient and fast in the process.Low carbon steel contains less than 0.3% carbon in the carbon steel mixture. Low carbon steel cannot be hardened because the carbon content is not enough to form a martensite structure. Welded joints are material or plate joints that are used for the welding process with the aim of getting maximum penetration from the joint.In this research, we are looking at the effect of the GMAW (Gas Metal Arc Welding) welding process with MIG (Metal Inert Gas) type on ST-42 steel by varying the V seam angle with a stick out height of 5 mm on the mechanical properties in the HAZ area.The hardness value before the welding process at an angle of 15 is in the HAZ area of 30.03 HRD for corners 30 and 45 is 32.51 HRD and 33.98 HRD, while for the impact strength at an angle of 15 is 0.2725 J/mm2, an angle of 30  and 45 namely 0.2439 J/mm2 and 0.2320 J/mm2 Keywords: Welding, HAZ (Heat Affected Zone), Impact Strength, Hardness
Pengaruh Variasi Persentase Hardener pada Campuran Clear Coat Terhadap Kekerasan Cat Pada Pengecatan Body Kendaraan Hermon Latumaerissa; Nevada. J.M Nanulaita; Roy R Lekatompessy; Laily Ulfiyah
Journal Mechanical Engineering Vol. 1 No. 3 (2023): Desember
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v1i3.2121

Abstract

Painting is a process of applying paint in liquid form to an object, to create a thin layer which then creates a hard layer or layer of paint. The function of painting itself is to give a layer to an object so that the object's lifespan can be longer. Attachment of paint to the surface can be done in many ways, wiping, smearing, brushing, spraying, dipping or in other ways. Attachment of paint by spraying is the paint attachment that is most often found in automotive painting workshops. Apart from that, attaching paint by spraying is easier in adjusting the area where painting will be carried out, the results are also good if done correctly. The quality of good painting results is influenced by many factors such as skills, materials used, etc., while determining good painting results is based on several factors, such as surface roughness, gloss power, etc. The hardness of the painting results is also greatly influenced by the percentage of hardener mixture in the paint mixture. The paint in question here is color paint (top coat). This research is to determine the best percentage of clearcoat in the painting process by testing the hardness of the painting results. The results obtained by varying the percentage of the mixture in the best clearcoat are in the percentage variations of 100 (Base): 55 (Hardener) + Thiner or Solvent (10% of Base) is 83.49 H, 100 (Base): 55 (Hardener) + Thiner or Solven (10% of Base) is 82.99 H, 100 (Base) : 45 (Hardener) + Thiner or Solven (10% from Base) is 82.51 H and the lowest is the variation 100 (Base): 60 (Hardener) + Thiner or Solvent (10% of Base) namely 79.57 H. Keywords: Painting, Clearcoat, Hardener and Paint hardness
ANALISA PENGARUH VARIASI KUAT ARUS PENGELASAN FLUX CORED ARC WELDING (FCAW) TERHADAP SIFAT KEKERASAN PADA DAERAH HAZ BAJA KARBON RENDAH Graciadiana. I. Huka; Josef Matheus; Nevada JM. Nanulaitta; Erwin Bravor Pattikayhatu
Journal Mechanical Engineering Vol. 2 No. 1 (2024): April
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v2i1.2579

Abstract

Welding is a process of joining metals by utilizing electric power as a source of welding heat. Flux-Core Arc Welding (FCAW) is a welding process that uses a heat source from electricity that is converted into a heat source in an electric arc, in this FCAW welding the type of protection used is flux or powder that is in the core of the welding wire (the welding wire is rolled in a roll). This research aims to observe changes in hardness values after welding, both low carbon steel hardness in the HAZ (Heat Affected Zone) area and outside the HAZ (Heat Affected Zone) area. Welding using V-joints with angles of 45° and 60° and varying the voltage strength at 16 volts, 18 volts and 20 volts. Hardness testing using the Rockwell method where the highest hardness value of the HAZ area for 45 is 22.95 HRD at a voltage strength of 20 volts. For V-joints for an angle of 60°, the highest hardness value of the HAZ area is also at a voltage strength of 20 volts with a value of 24.10 HRD. The highest increase in hardness value is at the V-angle 60° joint with a voltage of 20 volts with a hardness value of 21 HRD while the lowest is the V-angle 45° joint with a voltage of 16 volts at 18.67 HRD. Keywords: Hardness Value, HAZ (Heat Affected Zone), FCAW (Flux Cored Arc Welding)
PENGARUH VARIASI METODE DRYING PROSES TERHADAP KEKERASAN PENGECATAN BODY KENDARAAN BERMOTOR F. Demmatacco; Hermon. Latumaerissa; J.M Nanulaita
Journal Mechanical Engineering Vol. 2 No. 1 (2024): April
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v2i1.2582

Abstract

Coating is a process of applying paint in liquid form to an object, to create a thin layer which then forms a hard layer or paint layer. Factors that affect the quality of painting are the materials used, the viscosity of the paint, the painting temperature, and the skill in applying the paint. This study is to observe the process of changing the hardness value on the surface of the paint from coating. The drying process of painting uses 4 forms, namely drying indoors, outdoors, in an oven at a temperature of 50°C and 60°C with a mixture of paint, 100% base: 50% hardener + Thinner (10% of the base) Based on the study of the effect of the paint drying process on the hardness value of the coating, it can be concluded that the results of the average hardness value obtained, namely the use of the drying method using an oven with a temperature of 60°C has the highest hardness value of 84.10 HV followed by 82.90 HV and 81.93 HV for oven drying with a temperature of 50°C and drying indoors with a temperature of 35°C - 36°C, while the lowest hardness value is in outdoor drying with a temperature of 37°C - 39°C with a value of 80.68 HV. Keywords: Hardness Value, Coating, Temperature.
ANALISA VARIASI KAMPUH DAN ARUS LISTRIK LAS PADA MATERIAL BAJA KARBON MENENGAH TERHADAP KEKUATAN TARIK DAN STRUKTUR MIKRO SAMBUNGAN LAS Lasamahu, Stevanno B D; Huka, Graciadiana I; Nanulaitta, Nevada. JM
Journal Mechanical Engineering Vol. 2 No. 1 (2024): April
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This study aimed to investigate the effects of weld groove variations and welding current on the tensile strength and microstructure of medium carbon steel joints using FCAW (Flux-Cored Arc Welding). The researcher employed a quantitative approach with an experimental method. The specimens used in this research include FCAW with V-groove and 90 A current, FCAW with V-groove and 70 A current, FCAW with X-groove and 70 A current, FCAW with X-groove and 90 A current, raw material specimens, and microstructure specimens. The data analysis reveals that the highest average tensile stress value among the welded specimens was 463.50 MPa, observed in the FCAW X-groove with 90 A current specimen, while the FCAW V-groove with 70 A current specimen showed the lowest value at 295.1 MPa. Regarding the strain values, the FCAW X-groove with 90 A current specimen had the lowest average strain of 4.15%, whereas the FCAW V-groove with 70 A current specimen had the highest at 5.36%. In terms of microstructure, the FCAW V-groove with 70 A current specimen exhibited martensite, pearlite, and ferrite structures in the weld zone, and ferrite and pearlite structures in the heat-affected zone (HAZ) and base metal. For the FCAW X-groove with 90 A current specimen, pearlite and ferrite structures were found in the weld zone, HAZ, and base metal. Keywords: Carbon Steel, Weld Groove, Welding Current, Tensile Test, Microstructure
Co-Authors Agustinus O. Lopuhaa Annafiyah Annafiyah Basri Katjo Clara Sekeroney Cley Talkua Demmatacco, F Eka R. M. A. P. Lilipaly Erwin Bravor Pattikayhatu F. Demmatacco Faizatur Rohmah Frederick Dematacco Fredrik Demataco Graciadiana. I. Huka Helen Riupassa Hendry Y. Nanlohy Herman Tjolleng Taba Hermon Latumaerissa Hermon. Latumaerissa Huka, Graciadiana I Ike Dayi Febriana Imam A Hanifah Josef Matheus Julian Salakory Kelian, Nur Aisyah Utami Laily Ulfiyah Lasamahu, Stevanno B D Latuconsina, Muhammad Jen Leatemia, Josua M. Leatemia, Meiti Lekatompessy, R.R. Lekatompessy, Roy R. Leslie S Loppies Lukman Hadiwijaya Malakauseya, J. J Marthina Mini Masaki Yamaguchi Matheus, J Mohammad Anas Fikri Nanse H. Pattiasina Patikayhattu, Erwin Patty, Alexander A. Pelasula, Berthy Picanussa, Jovancko. S. S. Ramadhan, Fahri Ratna Ayu Dewi Ratna Ayu Pawestri Kusuma Dewi Rey Joy Toding Padang Roy R Lekatompessy Rudy Soenoko Soeprapto, Wahyono Steanly R.R. Pattiselanno Steanly R.R. Pattiselanno